Underage vape sales: Teen claims shops rarely check IDs how old do you have to be to vape Definitive Guide Youth have easy access to e cigarettes online through lax age verification and concealed deliveries Just a reminder, the minimum age to buy nicotine products in Indiana is 21. This means retailers are prohibited from selling cigarettes, e liquids, and e cigarettes to anyone under age 21. We Vaping on the rise in U.S., especially among young people Pew Research Center Vape Age Laws: Minimum Age to Buy Vapes in the U.S. & Online